Delve Analytics offers a whole bunch of metrics, some of which you'd probably not know: You can find out how much time you're spending on e-mail, or how many hours you work outside of your usual 9-to-5.

Microsoft

But possibly the most useful information Delve Analytics can give you is how many of your meetings are redundant, unproductive, or just too darn long. With that data, you can invite fewer participants or cancel meetings that are just being held for the sake of meetings.

(This seems to be a great example of Microsoft using software to solve its own problems - one of the biggest complaints we've heard from Microsoft employees over the years has been "too many meetings.")

Microsoft

You can even set goals for yourself, such as how many hours you can get to yourself and uninterrupted by meetings. It's a lot to take in.

Indeed, the main Microsoft Delve app lets you track what others are working on, kind of like a combination between Facebook's graph search and Office. With all that data flying around, and now the ability to analyze it, it's no wonder Delve is Microsoft CEO Satya Nadella's favorite Microsoft app.